PETER E. PORMANN holds a D. Phil from Oxford and won the Hellenic Foundation’s 2003 award for best doctoral thesis in the UK, Byzantine/Medieval History category. He is the author of The Oriental Tradition of Paul of Aegina’s Pragmateia. EMILIE SAVAGE-SMITH is professor of the history of Islamic science at Oxford. Her recent books include Magic and Divination in Early Islam, Medieval Views of the Cosmos, and Science, Tools and Magic.